olddragger

iTrader: (3)

cafornia--you mean what i did to the intake?

https://www.rx8club.com/attachment.p...2&d=1248482370
all the stuff i did are somewhere in here

what i did to the lim--was
1--completely sealed the vdi and smoothed out all ridges ext in the top part of the intake barrel, removed the outside vdi plate and made it all smooth.
2- removed the jet air tubes from the primary ports
3- clean the heck out of everything
4- removes some small casting ridges/spots in the intake runners
5- cut some of the blank casting spaces out of the intake to ventilate it some
6- polished it
7- installed a true phenolic gasket (reduced temps of the lim body--it did
8- heat wrapped the fuel rail.
all this while the engine was still in the car---yea baby!
olddragger

zenrx8

iTrader: (4)

Denny, I'll be the first to admit that I don't know everything, but based on the setup of the header, there's no way gases from the front or mid ports can mix with the rear port exhaust effectively. I'm told that the OBX has a cup arrangement that the sensor sits in, isolating it from the direct exhaust flow.

And I'm open to the notion that this is all OK; I'm still getting an 02 sensor CEL that hits if I sit at idle for more than 30 seconds after the car is warmed up. Could be the sensor, of course; is there a method for testing it?

Thanks,

Wes

olddragger

iTrader: (3)

Wes--hey dude---The only reason I said the sensor is ok there is because I ran an obx header for a little while and i had the same question. SO I consulted Charlie at Mazcare before i installed it. Charlie is one that would know these things and he assured me it would be ok. SO i put it on and my a/f's etc were the same as with the oem one.
Dunno whats happening with ya.
OD

zenrx8

iTrader: (4)

Like I said, I'm never surprised at what I don't know; also tells me where else to peek. I'm trying to sort out what the previous owner did to this car before I boost it up. Thanks Denny; I'll be looking at the Cobb map on the ECU next.

JMKuco

back to business !
If someone have a solution with the lean problem I'll be glad to test it...because I think running with this CEL turned on is not that good !
I have the re-amemiya headers and mid pipe with all my sensor installed...

any way here are my new babys since 2 weeks...

Rotr8

iTrader: (2)

Those Advans are sick,,, I want sooo bad,,,

olddragger

iTrader: (3)

what lean problem? are your a/fs going lean anywhere. any
ones?
OD

Rote8

Larger injectors can cure ANY lean "issues"

I may step up the P-1 position from 290; I don't know what to, but a step up may help my trims.

JWoody

i have a question about the supercharger kit. does it have any kind of warranty or anything like that for it?

zenrx8

iTrader: (4)

Just so you know, your Re-Amemiya headers have the same O2 sensor arrangement as my OBX headers. Denny knows his stuff, but with all respect, I can't see how sticking the O2 sensor in the pipe that comes only off the rear port of the rear rotor can give an accurate reading of the overall AFR. There are three exhaust ports on the motor for a reason; the stock header collects 02 data from downstream of where all three ports mix; ExoticSpeed and other headers feed the three exhausts into a common collector and the 02 sensor reads out of there. If your lean condition popped up after you installed the REAmemiya header, you may not have a lean condition, only a faulty 02 sensor reading due to the placement of the 02 sensor in the header. The only way I can see to test it is to put a bung in the midpipe just aft of the header/midpipe junction and either mover your 02 sensor there or stick a wideband commander in there and compare those readings with the ones you have now. I swear I would not trust the current placement for tuning.

Phil's 8

iTrader: (3)

You are different and maybe a very nieve....looking for warranty in a FI owners thread. Just to be nice I would suggest you contact Pettit and ask about warranty info@pettit.com
The nature of FI says "no warranty" just look at what the "fools" are doing to their cars and what is possible if you don't know what your doing.........If your worried about warranty you best stay stock.

olddragger

iTrader: (3)

no warranty from Pettit on your engine. probably is on the s.c. unit if he installs--Cam as been in business for a long time and he does stand behind his stuff----but engine--nope--no one will do that.

Hey Zenrx-- if you are showing bad a/f's after installing the header--something is wrong--you are right. do you have a midpipe with a spot for the 2nd o2 sensor? If you can get it to reach try putting it there just to see?
Yall do have a wide band installed--right? Or are you monitoring through the obii port?
I swear there has been a fair number of these headers installed and i havent heard about any of them getting different a/f readings because of it.
dont have an air leak anywhere do ya?
what kind of a/f's you getting other than the 20/1 at cruise? On acceleration does it get in the normal range? What are your LTFT's? It is a puzzle--i like puzzles
OD

Red Devil

Stillen, for one, does offer third party engine warranties on certain kits in their line such as the 350Z. As far as the credibility of the 3rd party, I have heard mixed reviews on those companies. In Stillen's case, they had independent testing performed before the warranty company would back their product and the powertrain.

JMKuco

When I install my re-amemiya header, I did not have any probleme with my O2 sensor !

But now that I have the pettit kit, at the idle position or when I take my feet out of the accelerator (sorry for my english) my A/F ratio is totaly lean !! that turns on the CEL light.
But if I drive the car, the ratio is correct, it s even rich at high RPM (>=7500).

what can correct this ? a new PCM recal ? larger injector ?

zenrx8

iTrader: (4)

Before you do any of that, I'd relocate the O2 sensor out of the header into a new bung just behind the header midpipe junction.

A/Fs will go dead lean when the TPS goes to zero, that is, you take your foot off the accelerator, so that part is normal; expect to see 20:1 or higher depending on the upper lean limit of your sensor. Lean readings on throttle closing are normal; stalling is not.

Now the other thing that can give you lean readings and stalling are a vacuum leak somewhere in the intake; it could be a vacuum hose not connected or a leak around the supercharger. Stalling at idle can also be caused by a stock fuel pump that is failing at the low voltage/low demand setting after high demand usage; this will be more evident with the supercharger installed because you're now placing higher demands on the fuel pump, which is adequate for stock tune, but starts to get strained once you start pushing over 300 hp; there are threads on that elsewhere in the forum.

Start with the 02 sensor position, and check all your vacuum fittings. Feel around the backplate of the supercharger with your fingers while the car is running and see if you notice a change in idle; you can spray WD40 around the intake and vacuum fittings with the car at idle while listening for a change in engine idle when the WD40 hits the leak. One thing at a time, this will work.

Hymee

iTrader: (1)

JMKuko,

The CEL code will help work out your problem. I have seen air-leaks / MAF calibration problems give funny CEL's that even lead you astray.

Cheers,
Hymee.

california style

idle problems often = air / vacuum leak.

zenrx8

iTrader: (4)

Yeah, I've been thinking vacuum leak too. Simplest explanation, I had a similar snafu installing my last supercharger, car ran great but threw a CEL "System Too Lean"; idle hunted a lot. Found the leak and fixed it, no more problems.

Denny I forgot to mention about the OBX header on my car; they guy I bought it from had just put it on. Wrapped and everything, nicOe job. Told me it started throwing CELs for a bad 02sensor in the manifold, never did it with the stock manifold. Did he frag the sensor? Entirely possible.

Heres the configuration of the OBX and RE-Amemiya manifold showing the 02 bung in the single pipe:



Heres an ExoticSpeed manifold showing a common collector where the 02 sensor mounts:



Got to think there's a difference there, just sayin'.

olddragger

iTrader: (3)

lol--I know , i know!

ANYWAY--I HAVE AN EMERGENCY CRY FOR HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
My car died today.
I was just going to Lowes for some home air filters--cruising at 3K in 6th has the engine wasnt really warm. All of a sudden--she died................like you had turned the switch off. No hiccup, no skip, no pop---just nothing. Had to get it flatbedded home.
damn--AND I HAVE A TRACK W/E THAT I NEED TO LEAVE FOR TOMORROW---OK?
Now when an engine stops like that its either a fuse or fuel. So I checked all the fuses--they are ok--swapped all the relays around and used the multmeter on them and they are all ok, the fuel pump relay specked out ok.
So I check the fuel pump---no sound coming from the tank---wtf?
Ok so I pull the connector from the pump and tried a circuit tester on it--it wouldnt light the bulb--none of the 4 terminals would--ignition was on---wtf! No power?
Just for the ***** i had an old pump that was beyond help( and it was dry) so i plugged it up and it spun---now i am really confused and pissed off. By the way I have never messed with the harness-(that part anyway
WTF do I do? Straight wire the bitch(dont really want to do that) but any magic/suggestion or even new cuss words would be appreciated.
olddragger

Macius8

iTrader: (3)

alternator, battery, grounds, all electrical connections ok?

olddragger

iTrader: (3)

yep.
OD

swoope

iTrader: (5)

that is the issue i had with my 09 pump. seems the connectors are not perfect matches..

mine works fine with the 04 to 08 pump. 09 not so much..

i would direct wire from the harness to the 09 pump..

that was the issue i had on the way to robleling in may!

beers

Hymee

iTrader: (1)

So if you plugged a different pump into the harness and it worked, doesn't that mean you pump has had the richard?

Or am I missing something??

Cheers,
Hymee.

olddragger

iTrader: (3)

maybe, still searching---the pump connector for the 09 pump power is fine --no mod needed--only the sending unit plug needed work?
OD

dannobre

iTrader: (3)

Nuke the pump..Buy a Walbro or Supra Denso pump and get it over with

We can help you with the changes